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Anthropic Accuses Chinese AI Labs of 190M Distillation Attacks on Claude

Anthropic said the campaigns used 190 million exchanges to extract Claude capabilities and train competing models without authorization, the company said.

  • On Thursday, Anthropic released a report alleging seven China-based AI developers, including Alibaba, DeepSeek, Moonshot, and Xiaomi, conducted large-scale campaigns to extract Claude's capabilities and replicate them in competing products.
  • The report describes 'illicit distillation,' where unauthorized labs use fraudulent accounts to harvest Claude outputs without authorization. Anthropic observed nearly 200 million exchanges linked to five separate distillation campaigns conducted over recent months.
  • Alibaba operated the largest campaign, generating more than 151 million exchanges between May and July. Moonshot and DeepSeek silently routed live customer conversations through Claude without user knowledge to train their own models.
  • Some exchanges contained sensitive credentials, including data from a Russian government database and a Chinese police system. Anthropic banned associated accounts, though Alibaba, Moonshot, and DeepSeek did not respond to requests for comment.
  • Technical forum commenters questioned whether Anthropic can accurately distinguish Chinese AI labs from third-party token resellers operating on the same infrastructure. OpenAI and Google have previously published reports attributing similar distillation activities to DeepSeek.
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Antropic, a U.S. artificial intelligence (AI) company, disclosed the specific methods and scale used by Chinese companies to extract the capabilities of its model, "Claude," and utilize them to train AI models. Following the U.S. government's concern over Chinese companies' "industrial-scale malicious distillation," the disclosure of these specific cases has heightened tensions between the U.S. and China.

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Memeburn broke the news on Tuesday, September 8, 2026.
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